package com.meetingshow.common.base.dao.model;import java.util.ArrayList;import java.util.List;public class RelationList {    private List<Relation> element;    public RelationList() {        element = new ArrayList<Relation>();    }    public void add(Relation relation) {        element.add(relation);    }    public Relation getAt(int n) {        return (Relation) element.get(n);    }    public int size() {        return element.size();    }}